Short Wavelength UV LEDs Based on Bulk Nitride Substrates

基于块状氮化物基板的短波长 UV LED

• 批准号: 7054834
• 负责人: LEO J SCHOWALTER
• 金额: $ 10万
• 依托单位: CRYSTAL IS, INC.
• 依托单位国家: 美国
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-09-20 至 2006-03-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7054834
• 关键词: aluminum; bioengineering /biomedical engineering; biomedical equipment development; gallium; light emission; light intensity; lighting; nitrogen compounds; semiconduction; ultraviolet radiation

DESCRIPTION (provided by applicant): Modern biomedical instrumentation relies on ultraviolet (UV) light sources to implement a broad range of detection techniques. The long-term goal of the proposed effort is the development of solid-state UV light emitting diodes (UV LEDs) as a replacement for existing lamp sources at wavelengths shorter than 360 nm, where commercial solid-state devices do not exist. The proposed approach is based on the fabrication of UV LEDs in the aluminum gallium nitride (AIGaN) material system on a recently-developed bulk single-crystal aluminum nitride (AIM) substrate. The unique properties of this AIM substrate, including its close lattice- match to AIGaN alloys and its exceedingly low defect density, enable the manufacture of LEDs with shorter wavelength, higher efficiency, higher brightness, and longer lifetime than those fabricated on alternative substrate materials. The Phase I program is to design and demonstrate a UV LED with emission at 340 nm. A novel epitaxial structure in the AIGaN system will be designed, modeled, grown and characterized. Then devices will be fabricated and tested. At the 340 nm wavelength and shorter, such UV LEDs will offer improved efficiency, compactness, reliability, and cost relative to existing lamps, enhancing the performance and utility of biomedical research tools and perhaps fostering a new generation of compact microfluidic instruments. Ultimately, this will enable a greater understanding of the biological mechanisms that underlie human health, the discovery of new therapies and diagnostics, and more precise control of pharmaceutical manufacturing processes and drug quality.

描述（由申请人提供）：现代生物医学仪器依赖于紫外线（UV）光源来实施广泛的检测技术。拟议工作的长期目标是开发固态UV光发射二极管（UV LED），以替代比不存在商业固态设备的360 nm的现有灯源的替代。所提出的方法基于在最近开发的散装单晶氮化铝（AIM）底物上在氮化铝（AIGAN）材料系统中制造紫外线LED。该AIM底物的独特性能，包括与Aigan合金的密切格子匹配及其极低的缺陷密度，可以比在替代底物材料上制造的LED制造具有较短波长的LED，更高的效率，更高的亮度和更长的寿命。第一阶段的程序是设计并演示在340 nm处发射的紫外线LED。 Aigan系统中的新型外延结构将被设计，建模，生长和表征。然后将制造和测试设备。在340 nm波长和较短的情况下，这种UV LED将提供提高效率，紧凑性，可靠性和成本相对于现有灯，从而增强了生物医学研究工具的性能和实用性，并可能促进新一代紧凑的微流体仪器。最终，这将使人们对人类健康，新疗法和诊断的发现以及对药物制造过程和药物质量的更精确控制的生物学机制有更深入的了解。